Furnace-wall construction.



PATENTED MAY 23. 1905.

D. BAKER. FURNAGE WALL CONSTRUCTION APPLICATION IILED MAR-15. 1904.

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No. 790.269. l PATENTED MAY 2s, 1905. D. BAKER.

l FURNACE WALL CONSTRUCTION.

APPLIOATION FILED MAR. 15, 1904.

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' and 5, in which wall openings 6 are left at Patented May 23, 1905.

PATENT OEEICE.

DAVID BAKER, OF NEWTON, MASSACHUSETTS.

FURNACE-WALL CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 790,269, dated May 23, 1905.

Application filed March 15, 1904. Serial No. 198,209.

To aN, ill/tom t may concern:

Be it known that I, DAVID BAKER, of Newton, county of Middlesex, and State of Massachusetts, have invented a new and useful Improvement in Furnace-Wall Constructions, of which the following is a specification. f

This invention relates to cooling devices for furnace-walls, intended more particularly for use in boshwall construction; and the invention consists of a protective device or holder for the bosh-plates designed'with the view of relieving the plates of the weight and strains of the superposed wall, whereby the life of the bosh-plates is prolonged and their removal from the wall readily permitted.

The inventionconsists also in the details of construction and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a sectional view of a portion of the boshwall of a furnace having my invention embodied therein. Eig. 2 is a front elevation of the same with portions of the encircling 'bands broken away to expose other parts to view. Fig. 3 is a perspective vieW,on an enlarged scale, of one of the protective devices or holders. Fig, 4 is a top plan view of the same. Fig. 5 is a front elevation of the same. Fig. 6 is a verticaltransverse section on the line 6 6 of Fig. 5.

Referring to the drawings, 1 represents a portion of the bosh-wall of a furnace constructed of refractory material, in the present instance of courses of fire-brick 2, 8, 4,

intervals for the insertion of bosh-plates 7, usually of bronze and of a construction and form to admit of the circulation of a cooling medium.l

8 represents my improved protective devices or holders, preferably of cast-iron,

`which are seated in the wall end to end immediately over the respective bosh-plates and which rest at their ends and are supported by the portions of the wall between the openings, which portions of the wall are preferably in the form of solid spacing-blocks 9, each of which aifords a seat for the adjacent ends of contiguous holders. As a result of this construction and arrangement the holders conjointly support the entire weight of the superposed parts of the wall, and thus effectually relieve the bosh-plates of the extreme and severe strains which would otherwise be received by them; f

The plate-holders 8 are of a construction and form adapted to give them the greatest resisting power in the direction in which the weight of the wall is exerted, and they are further designed with the view of affording a seat or rest for the bands 10, which usually encircle the vbosh wall at intervals. The form of these holders is clearly illustrated in Figs. 3 to 6, inclusive, where it will be seen that each comprises a casting of general rectangular form, with a front horizontal longitudinallyeextending flatk supporting-surface 11 and with a rear longitudinally-extending supporting-rib 12, on which Ythe superposed bricks of the wall rest. The front face of the supporting-surfacell extends vertically, as at 13, and is curved longitudinally to conform to the outer curvature of the wall, and from the lower edge of this vertical face a forwardly-projecting ledge 15 extends beyond the adjacent surface of the wall, which ledges of the several holders conjointly form a support or seat for the encircling bands 10 and eifectually retain them in position.

Thefront supportingsurface 11 is connected with the main body of the casting by a vertical portion 17, between which and the under side of the supporting-surface 11 a series of braces or brackets 18 extend, so as to give firm support to the surface 11 and prevent sagging or breakage of the same from the body. 4

On the under side of the casting, near its rear end, is a vertical depending longitudinally-extending projection 19, terminating at its ends inward of the sides of the casting, so as to extenddownward intol the space between the blocks 9, and which is curved upward between its ends to conform to the upper surface of the bosh-plate, which when the holders are in place in the wall fits snugly between this curved surface and the underlying supporting-brick 4.

hen the parts are assembled in operative relation in the bosh-wall, as shown in Fig. 2, the ends of the castings rest on the spacingblocks 9, which in turn rest on and receive support from the portions of the wall beneath, in the present instance the courses 5 of hre-brick, and the castings thus give direct support to the superposed parts of the Wall, in the present instance-the courses 4 of firebrick, this arrangement forming, in effect, openings or recesses with bottoms formed of the courses 5 of fire-brick and tops formed by the castings, in which openings the boshplates are seated and in which they are effectually relieved of the weight of the wall.

It will be observed that my protective device or holder consists of a single member or casting which at its ends receives direct support from the portions of the furnace-wall left between the openings in which the bosh- -plates are seated. i Consequently these castings form the tops of these openings, and the wall itself forms the bottoms of the same, on which the bosh-plates directly rest. It will be observed,further, that the supporting-surfaces 11 and 12 of the casting and the Ongitudinally extending projection 19 in the forms described constitute, in effect, longitudinal strengthening-ribs, which add greatly to the stiffness and rigidity of the structure as a whole, while the brackets or braces 18 give iirm support to the forward surface and enables it to effectually resist the severe strain exerted at this point by the weight of the superposed parts of the wall.

Having thus described my invention, what I claim is-- 1. In combination witha furnace-wall provided at intervals with openings having their bottoms Jformed by the masonry of the wall, bosh-plates extending into said openings and seated directly on the bottoms of the same, and protective devices for the bosh-plates, each device comprising asingle integral structure extending across the top of the opening and supported at its ends directly by the portions of the furnace-wall between the openings.

I2. A protective device for bosliplates, comprising a rectangular casting adapted to extend over the bosh-plates and to receive support from the furnace-wall, said casting formed with a body portion, a forward raised dat bearing-surface 11 joining the body by a vertical portion 17 and a brace or bracket 1S connected with the under side of the bearing-surface and with the front face of the portion 17.

3. A protective device for bosh plates, comprising a single casting having aflat body portion, raised bearing-surfaces at the front and rear, a depending projection on its under side adapted to bear frictionally on the upper side of the bosh-plate, and a ledge at the front to give support to the band.

In testimony whereof I hereunto set my hand, this 23d day oi' February, 1904, in. the presence of two attesting witnesses.

DAVID BAKER.

Witnesses:

HARLEY BRooKI-roUsE, FRANKLIN T. MILLER. 

